Headaches Nausea and feeling horrible all day

I’m six weeks tomorrow and for the last week and a half I feel like there is a ball in the pit of my stomach and I feel like I’m going to get sick at any moment from the moment that I wake up in the morning until bedtime, and I have a nauseous headache too if anyone gets those. I don’t know what to do to feel better. I have other kids to take care of and I feel just miserable even sitting down doing nothing let alone taking care of my other young children. Ginger ale makes me want to get sick, nothing sounds good. I don’t know what to do. I’m just miserable. This wasn’t a planned pregnancy either and I had just decided we didn’t want anymore children a few weeks ago, and I feel like that’s making this worse. I feel terrible for feeling the way I do too. We went thru fertility treatments with our other two and years of trying and infertility, which makes me feel like a monster now and hate myself for feeling the way I do now. Well have to move eventually and get a new car etc and I feel like the stress and feeling so sick is amplifying everything. Any advice? I just physically and mentally feel drained and like a terrible person.